245 
anatomy of the mole-cricket, 
rounded edges, which are probably elastic ; but I feel by no 
means certain that these are exclusively characteristic of the 
male, though I certainly found them most distinctly deve- 
loped in a male individual. 
But my acquaintance with the interesting insect, the history 
of which has formed the subject of this paper, did not com- 
mence till towards the close of that period of the summer 
during which the animal is heard to produce its peculiar 
sound ; and I propose therefore to resume the investigation 
of this point at a future opportunity. 
Oxford, Nov. 13, 1824. 
Dimensions of a full grown mole-cricket. 
Length of the body from the extremity of the lip to inches. 
the extremity of the vent - - 2.0 
Length of the head - - - 0.165 
thoracic division - - - 0.5 
abdominal division _ _ _ 1,33 
Breadth of the thorax - - - - - 0.5 
abdomen - - - - 0.5 
Length of the antennae of the head - - 0.825 
caudal antennae - - 0.666 
Length of the whole alimentary canal - - 2.0 
esophagus - - - - 0.5 
Length from the crop to the great intestine - 0.5 
Length of the great intestine - - - 1.0 
